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To: Elroy Jetson who wrote (68243)	8/28/2005 11:47:21 PM
From: Maurice Winn	Respond to of 74559

No oxygen depletion to speak of. We are producing parts per million of CO2 whereas there is 15% oxygen or some such amount in the atmosphere [Google would know - maybe it's 30%, I forget, unlike Google]. If we reduce oxygen by a tiny amount, it might reduce 10,000 metre track times at the Olympic Games, but probably not as by then people will be genetically engineered for cheetah speeds. I doubt we'll even mess around with carbon sequestration. We'll go to photovoltaics, chlorophyl crops etc and improved technology [SUVs are ridiculous monstrosities for moving 70 kg or even 200 kg of human around a city]. Mqurice

To: Elroy Jetson who wrote (68243)	8/29/2005 12:46:18 AM
From: Moominoid	Read Replies (2) \| Respond to of 74559

A more practical scheme uses some sort of intensive bacterial bio-farm to convert the carbon dioxide back into oxygen using sunlight. The bottom line is that plant and bacterial conversion of sunlight is far more efficient than current photo-voltaic cells. In last month's Scientific American there was a report on a system that grows algae in the exhaust stream from a power station. Seemed to me the cost was very high for that too. Problem with solar energy is it is very diffuse. That's why we had an industrial revolution based on fossil fuels in the first place. Photovoltaics are much more technically efficient than plants in terms of converting sunlight into usable energy but even with recent advances more expensive. Here is info on the CMI: princeton.edu I interviewed with these guys for a research position on the econ side, but then the job I have now came up.